The "BANG" is simply caused with some friction and a little bit of chemistry...

Under the bright wrapping is the cardboard tube and in that tube are... two cardboard strips. Now for the interesting part!

On one strip there is a tiny amount of a chemical compound called silver fulminate - AgCNO (This is made by reacting concentrated nitric acid with silver and ethanol) Silver fulminate is very sensitive and will even explode under it's own weight in large quantities! On the other strip is fine sandpaper. This creates friction hence creating heat. This tiny amount of heat is enough to...

Merry Christmas Everyone hope you are all having a great christmas!!! Thank you heaps for reading and all your support!

Can't wait till meet again in next week's blog post and till then MERRY CHRISTMAS!!!